SikaTop® Seal-107 Elastik is a two part polymer modified, elastic cementitious waterproof mortar slurry comprising of a liquid polymer and a cement based mix. A Flexible Protective Coating for Concrete, Masonry & Polystyrene. 1. bag Sika Top Seal "B" 1. bottle Sika Top Seal "A" 1/4 bag Kypex Patch & Plug